The ones I started with were a bit under-varied and over-orthogonal.
Get rid of some of the more pointless things like 16x16 with lots of
extra moves, and add some with different colour counts. While I'm
here, make the menu descriptions nicer.
Based on a web game I saw a few years ago, and dashed off this weekend
after I thought of a way to write a good (though not quite optimal)
heuristic solver, here's a random little thing not quite in the same
line as the most usual kind of Puzzles fare: instead of making you
scratch your head to find any move to make at all, it's easy to find
solutions in principle, and the challenge comes from having to do so
within a move limit.
